Checking the day's holiday class in time eval schema

In the time evaluation schema, is there a way to retrieve/query the current day's holiday class? I know that the holiday class is stored in the PSP table, but what function can be used in a personnel calculation rule such that I can check the value of the day's holiday class (i.e. if holiday class = 1, do this; if holiday class = *, do this)?

Thanks in advance for your help.